Bug 313125

Application: plasma-desktop (0.4)
KDE Platform Version: 4.8.4 (4.8.4)
Qt Version: 4.8.2
Operating System: Linux 3.7-trunk-amd64 x86_64
Distribution: Debian GNU/Linux 7.0 (wheezy)

-- Information about the crash:
- What I was doing when the application crashed:
I was inputing Chinese with fcitx-pinyin on the notepad widget
- Custom settings of the application:
I added the notepad widget to the workspace. I set the Desktop Effects-->General-->Animation speed to "Very Fast", and turned on the "Use VSync" option in Desktop Effects-->General-->Advanced-->OpenGL Options

The crash can be reproduced every time.

-- Backtrace:
Application: Plasma Desktop Shell (plasma-desktop), signal: Segmentation fault
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[Current thread is 1 (Thread 0x7f64911cb780 (LWP 3347))]

Thread 3 (Thread 0x7f646a71d700 (LWP 3348)):
#0  0x00007f6490aaee33 in poll () from /lib/x86_64-linux-gnu/libc.so.6
#1  0x00007f6484daf624 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f6484daf744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f648dc73296 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#4  0x00007f648dc438af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#5  0x00007f648dc43b38 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#6  0x00007f648db46d70 in QThread::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#7  0x00007f648dc241bf in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007f648db49d0b in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#9  0x00007f64858beb50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#10 0x00007f6490ab9a7d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#11 0x0000000000000000 in ?? ()

Thread 2 (Thread 0x7f6466742700 (LWP 3354)):
#0  0x00007f64858c32d4 in pthread_cond_wait@@GLIBC_2.3.2 () from /lib/x86_64-linux-gnu/libpthread.so.0
#1  0x00007f648acb2e77 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#2  0x00007f648acb2ea9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtScript.so.4
#3  0x00007f64858beb50 in start_thread () from /lib/x86_64-linux-gnu/libpthread.so.0
#4  0x00007f6490ab9a7d in clone () from /lib/x86_64-linux-gnu/libc.so.6
#5  0x0000000000000000 in ?? ()

Thread 1 (Thread 0x7f64911cb780 (LWP 3347)):
[KCrash Handler]
#5  0x00007f648d249a10 in QTextLayout::lineCount() const () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#6  0x00007f648d29378c in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#7  0x00007f648d29385e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#8  0x00007f648d29503e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007f648d29720c in QTextCursor::movePosition(QTextCursor::MoveOperation, QTextCursor::MoveMode, int) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#10 0x00007f6474aed3ba in ?? () from /usr/lib/kde4/plasma_applet_notes.so
#11 0x00007f648d03dda8 in QWidget::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007f648d3e8d36 in QFrame::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007f648d46897b in QAbstractScrollArea::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007f648d4555b1 in QTextEdit::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007f648cfee70c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#16 0x00007f648cff2b8a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#17 0x00007f648e94d886 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#18 0x00007f648dc44b5e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#19 0x00007f648cfeec28 in QApplicationPrivate::dispatchEnterLeave(QWidget*, QWidget*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007f648d5c8998 in QGraphicsProxyWidget::hoverLeaveEvent(QGraphicsSceneHoverEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#21 0x00007f648d5ab05e in QGraphicsItem::sceneEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007f648d5d461e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007f648d5d482d in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007f648d5e7d3a in QGraphicsScene::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#25 0x00007f648cfee70c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#26 0x00007f648cff2b8a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#27 0x00007f648e94d886 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#28 0x00007f648dc44b5e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#29 0x00007f648d60150f in QGraphicsView::viewportEvent(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#30 0x00007f648dc44cc6 in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#31 0x00007f648cfee6dc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#32 0x00007f648cff2b8a in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#33 0x00007f648e94d886 in KApplication::notify(QObject*, QEvent*) () from /usr/lib/libkdeui.so.5
#34 0x00007f648dc44b5e in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#35 0x00007f648cfeec28 in QApplicationPrivate::dispatchEnterLeave(QWidget*, QWidget*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#36 0x00007f648d06903e in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#37 0x00007f648d08fbc2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#38 0x00007f6484daf355 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#39 0x00007f6484daf688 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#40 0x00007f6484daf744 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#41 0x00007f648dc73276 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#42 0x00007f648d08f83e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#43 0x00007f648dc438af in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#44 0x00007f648dc43b38 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#45 0x00007f648dc48cf8 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#46 0x00007f6490dac4c5 in kdemain () from /usr/lib/kde4/libkdeinit/libkdeinit4_plasma-desktop.so
#47 0x00007f64909fdead in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
#48 0x0000000000400781 in _start ()

Possible duplicates by query: bug 301554, bug 299074, bug 298582, bug 293202.

Reported using DrKonqi